<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Insert title here</title>
<style type="text/css">

:empty{
	background-color: yellow
}

</style>
</head>
<body>
	<table border="1">
		<tr>
			<td>AAAAA</td><td>BBBBB</td><td>CCCCC</td>
		</tr>
		<tr>
			<td>DDDD</td><td></td><td>FFFF</td>
		</tr>
	</table>
</body>
</html>